yaml_sequences

Sequences

Sequences:

• Lists, arrays, collections
• Denoted with a dash and a space`(- )
• Can be combined with mappings
  • "Mapping of sequences"
  • "Sequences of mappings"

---

• Mapping of Sequence:

  • Block style:

    roles:
      - webserver
      - wp_database

  • Flow style:

    roles: [ webserver, wp_database ]

• Sequence of Mappings:

  datacenter:
    - location: Philadelphia
      cab: 13
      cab_unit: 13

---

• Cannot be:
  • Blank
  • Nested without mapping

Not allowed:

- playbooks
  - wordpress
  - 
  mysql

• No : after playbooks
• Empty sequence

For empty sequence we can use - "".